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74F456 Datasheet, PDF (3/12 Pages) NXP Semiconductors – Buffers/drivers
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Philips Semiconductors
Buffers/Drivers
Product specification
74F455,* 74F456
LOGIC SYMBOL – 74F455
4 5 6 8 9 10 11 12
D0 D1 D2 D3 D4 D5 D6 D7
3
PI
1
OE0
2
OE1
ΣE
23
ΣO
24
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
VCC = Pin 7
22 21 20 17 16 15 14 13
GND = Pin 18, 19
SF00959
LOGIC SYMBOL (IEEE/IEC) – 74F455
2K
3,5,6,7,8
[EVEN]
23
9,10,11,12
24
3
3,5,6,7,8
P3 9,10,11,12
[ODD]
1
w1
2
EN4
4
Z5
5
Z6
6
Z7
8
Z8
9
Z9
10
Z10
11
Z11
12
Z12
4
22
21
20
17
16
15
14
13
SF00961
FUNCTION TABLE
INPUTS
OE0
OE1
Dn
L
L
L
L
L
H
H
X
X
X
H
X
H = High voltage level
L = Low voltage level
Z = High impedance “off” state
X = Don’t care
OUTPUTS
74F455
74F456
Qn
Qn
H
L
L
H
Z
Z
Z
Z
LOGIC SYMBOL – 74F456
4 5 6 8 9 10 11 12
D0 D1 D2 D3 D4 D5 D6 D7
3
PI
1
OE0
2
OE1
ΣE
23
ΣO
24
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
VCC = Pin 7
22 21 20 17 16 15 14 13
GND = Pin 18, 19
SF00960
LOGIC SYMBOL (IEEE/IEC) – 74F456
2K
23
3,5,6,7,8
[EVEN]
9,10,11,12
24
3,5,6,7,8
[ODD]
3
P3 9,10,11,12
1
­1
2
EN4
4
Z5
5
Z6
6
Z7
8
Z8
9
Z9
10
Z10
11
Z11
12
Z12
4
22
21
20
17
16
15
14
13
SF00962
FUNCTION TABLE for PARITY OUTPUTS
INPUTS
OUTPUTS
Number of inputs, High (PI, D0 - D7)
ΣE
ΣO
Even - 0, 2, 4, 6, 8
H
L
Odd - 1, 3, 5, 7, 9
L
H
Any OEn = High
Z
Z
H = High voltage level
L = Low voltage level
Z = High impedance “off” state
X = Don’t care
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08
3
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